Any adept in the world of meditation will be familiar with the existence of an 'inner world'. The 'outer world' is one we know the existence of only because the mechanics of manifestation provide a barrage of sensory stimulation. As it turns out this barrage of stimulation creates a remarkably accurate reflection of a material world. The field of this reflection is The Mind.
The foundation of the inner world is pure un-formed Awareness: infinitely supple unformed Awareness. This unformed Awareness is the foundation of all life. Its existence is the fruit of molecular order, and in the maintenance of that order it must access and mine external forms.
This dependence upon the mining of external forms for sustenance results in the emergence of Mind. And Mind is the driver of the sophistication of form.
By the time we get to creatures such as human beings Mind has, in its quest for sustenance, developed layers of complexity leading up to a sublimely effective behavioral property: consciousness.
Though a tool of extraordinary efficacy, consciousness is the outer-most layer of Awareness and patently superficial ('superficial' as in 'surface' not as in 'without merit') . And this surface of The Mind is brilliantly reflective. So reflective in fact, that there exists an entire spectrum of Mind that is so autonomously effective in its process that in the light of ordinary consciousness it is invisible. We now have a name for it: The Unconscious Mind.
The point of this excursion is to point out that all aspects of Mind are superficial to Awareness.
If our identity is in Mind then our identity is superficial